All I know is that Vega Arms of Sacramento was the lead importer for the FTR’d Australian BSR’s once surplus was allowed in again after 1986. There are very few BSR’s with Australian D^D or A^F property stamps floating around the collector market that were NOT imported by Vega, but very rare.I see that "Vega Sac Ca" on your last picture of the revolver. Are you familiar with Vega?
Other than that, in 1911 forums one can find horror stories about some 1911 clones which Vega put together and sold under its name, but I’ve never encountered one. I don’t know when Vega went out of business.